#toTop {
    display: none;

    position: fixed;
    right: 5px;
    bottom: 5px;

    width: 128px;
    height: 128px;

    background-image: url("../images/up.png");
    background-repeat: no-repeat;

    opacity: .4;

    filter: alpha(opacity=40); /* For IE8 and earlier */
}
#toTop:hover {
    opacity: .8;

    filter: alpha(opacity=80); /* For IE8 and earlier */
}
